Table 5.

Sensitivity and specificity corresponding to each cutoff value of Huaxi Unplanned Extubation Risk Assessment Scale

Cutoff	Sensitivity	1-specificity	Specificity	Youden indexa
10.0000	1.000	1.000	0	0
11.5000	1.000	1.000	0	0
12.5000	1.000	0.996	0.004	0.004
13.5000	1.000	0.932	0.068	0.068
14.5000	0.962	0.735	0.265	0.227
15.5000	0.962	0.601	0.399	0.361
16.5000	0.923	0.448	0.552	0.475
17.5000	0.885	0.335	0.665	0.55
18.5000	0.885	0.260	0.74	0.625
19.5000	0.846	0.219	0.781	0.627
20.5000	0.846	0.186	0.814	0.66
21.5000	0.769	0.157	0.843	0.612
22.5000	0.692	0.122	0.878	0.57
23.5000	0.500	0.093	0.907	0.407
24.5000	0.346	0.066	0.934	0.28
25.5000	0.115	0.045	0.955	0.07
26.5000	0.077	0.032	0.968	0.045
27.5000	0.038	0.018	0.982	0.02
28.5000	0.000	0.007	0.993	-0.007
29.5000	0.000	0.001	0.999	-0.001
31.0000	0.000	0.000	1	0

^aYouden index = sensitivity + specificity - 1.